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Biomedical Optics, BIOMED 2008

作者： Bozinovic, Nenad Ventalon, Cathie Ford, Timothy Mertz, Jerome Department of Biomedical Engineering Boston University Boston MA 02215 United States

While fluorescence microscopy has become an essential tool in biomedical sciences, many cell types cannot be readily accessed due to their location in hollow tissue tracts (GI mucosa cells) or deep within organ tissue. Standard endoscopes generally provide insufficient resolution for tissue characterizations and obtaining biopsy is long, costly and prone to errors. Even when samples are safely taken from the patient’s body, histology cannot provide functional and dynamic information during the endoscopic procedure. We present improvements to a novel endomicroscopy technique that may advance future prospects for the possibility of “optical biopsies”.

关键词： Biological imaging Endomicroscopy Fluorescence microscopy image processing algorithms Speckle patterns Tissue Imaging systems (110.0110) Three-dimensional image acquisition (110.6880) Medical optics and biotechnology (170.0170) Endoscopic imaging (170.2150)

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Accuracy test for a corneal topographer based on null-screen method: Preliminary results

Accuracy test for a corneal topographer based on null-screen...

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Latin America Optics and Photonics Conference, LAOP 2014

作者： Estrada-Molina, Amilcar Díaz-Uribe, Rufino Centro de Ciencias Aplicadas y Desarrollo Tecnológico Universidad Nacional Autónoma de México Apto. Postal 70-186 México D.F.C.P 04510 Mexico

The accuracy test of a corneal topographer based on null-screen method is presented. This accuracy test is conducted by testing a calibration sphere. The accuracy found was of 5.8 μm for differences of elevation;75 ... 详细信息

ISBN: (纸本)9781557528254

关键词： Astigmatism Calibration image processing algorithms Optical surfaces Reflection Surfaces Height measurements (120.2830) Optical instruments (120.4640) Ophthalmic optics and devices (330.4460)

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Dynamic molecular imaging: Anatomical co-registration and dynamic contrast enhancement

Dynamic molecular imaging: Anatomical co-registration and dy...

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Biomedical Optics, BIOMED 2008

作者： Hillman, Elizabeth M.C. Bouchard, Matthew B. Burgess, Sean A. Gossage, Kirk Mansfield, James Levenson, Richard M. Department of Biomedical Engineering Columbia University NY 10027 United States 35B Cabot Road Woburn MA 01801 United States

A new approach to acquiring and analyzing small animal molecular imaging data is presented. By imaging the in-vivo dynamics of a dye or targeted probe, improved contrast and alloptical anatomical co-registration can b... 详细信息

关键词： Functional imaging image processing algorithms In vivo imaging Molecular imaging Optical imaging Three dimensional imaging Medical optics and biotechnology (170.0170) Medical and biological imaging (170.3880) Functional monitoring and imaging (170.2655)

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Increased precision of zernike fit to noisy truncated phase maps

Increased precision of zernike fit to noisy truncated phase ...

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Optical Design and Fabrication, Freeform 2017

作者： Adelsberger, Kathleen Mack, Stephen Tienvieri, Ted Rich, Tim Corning Tropel Corporation 60 O'Connor Rd FairportNY14450 United States

When a polynomial set fails to meet the conditions of orthogonality, errors appear in the calculated coefficients. Restoring orthogonality by fitting a custom Zernike set to noisy phase maps provides increased precisi... 详细信息

ISBN: (纸本)9781943580316

关键词： image processing algorithms Lens design Pupil Tolerancing Zernike polynomials

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Visual prosthesis: Recent development and future challenges

Visual prosthesis: Recent development and future challenges

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Bio-Optics: Design and Application, BODA 2011

作者： Ren, Qiushi Department of Biomedical Engineering Peking University China

ISBN: (纸本)9781557529091

关键词： image processing algorithms Iris Optic nerve Retina Retinal ganglion cells Vision Vision, color, and visual optics (330.0330) Vision (330.7310)

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image quality assessment: How blind is blind

Image quality assessment: How blind is blind

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Computational Optical Sensing and Imaging, COSI 2012

作者： Bovik, Alan C. University of Texas at Austin United States

ISBN: (纸本)1557529477

Blind image Quality Assessment (Blind IQA) is usually synonymous with “no-reference” IQA, viz., without a pristine image available for quality comparison. However, other sources of information are used to design IQA models: human opinion scores, mathematical models of distortion, perceptual models; statistical models of distorted images, and statistical models of images that are not distorted.

关键词： algorithms Distortion image processing image processing algorithms image quality assessment

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Annotation burden reduction in deep learning for lensless imaging flow cytometry with a self-supervised pretext task

Annotation burden reduction in deep learning for lensless im...

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Optics and the Brain, BRAIN 2023 - Part of Optica Biophotonics Congress: Optics in the Life Sciences 2023

作者： Hong, Tianqi Fang, Qiyin School of Biomedical Engineering McMaster University 1712 Main St W HamiltonL8S 4L8 Canada Department of Engineering Physics McMaster University 1712 Main St W HamiltonL8S 4L8 Canada

A self-supervised pretext task is developed based on flow profile and motion extraction for cell detection in a lensless imaging flow cytometer. It reduces the annotation burden, automatically selects usable frames, a... 详细信息

ISBN: (纸本)9781957171210

关键词： Blood Clinical applications Cytometry image processing algorithms Neural networks Synthesis methods

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A Comparative Analysis of Implementation Performances for image processing Applications Used to Control Robotic Arms

A Comparative Analysis of Implementation Performances for Im...

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IEEE International Conference on Environment and Electrical Engineering

作者： Radu-Stefan Ricman Roland Szabo Aurel Gontean Applied Electronics Department Politehnica University Timisoara Timisoara Romania

This paper presents an analysis of code implementation performance for image processing algorithms. The test is made for image processing algorithms for robotic arms, but it is suitable for any type of image processing software. image processing software can use quite big amount of resources, so this way it can be tested which platform, which operating system or which programming language is the most suitable for usage. The image processing task is a color detection task with some line and circle overlays for robotic arm's guidance. The implementations were tested base on code line numbers, code size on disk, binary file size on disk, used memory during execution and used CPU during execution.

关键词： code execution code size image processing algorithms performance comparison resource utilization robotic arm control software implementation

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Simulation of a zoom lens with Wavefront Coding using various methods of deconvolution

Simulation of a zoom lens with Wavefront Coding using variou...

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Frontiers in Optics, FIO 2013

作者： Dufouleur, Paul Barritault, Pierre Lepine, Thierry CEA LETI MINATEC Campus DOPT 17 rue des martyrs 38054 Grenoble CEDEX 9 France Université de Lyon Université Jean Monnet 42000 Saint-Etienne France Institut d'Optique Rhône Alpes 18 rue B. Lauras 42000 Saint-Etienne France

We design a single moving element zoom lens using wavefront coding. We study the impact of different types of deconvolution in order to optimize the image, according to a visual metric. © OSA 2013.

ISBN: (纸本)9781557529879

We design a single moving element zoom lens using wavefront coding. We study the impact of different types of deconvolution in order to optimize the image, according to a visual metric. © OSA 2013.

关键词： Deconvolution image processing image processing algorithms image quality Wavefront encoding Zoom lenses Lens system design (080.3620) Metrics (110.3925) Wavefront encoding (110.7348)

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Investigation on vibration excitation of debonded sandwich structures using time-average digital holography

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APPLIED OPTICS 2017年第13期56卷 F7-F13页

作者： Thomas, Binu P. Pillai, S. Annamala Narayanamurthy, C. S. Indian Inst Space Sci & Technol Dept Aerosp Engn Thiruvananthapuram 695547 Kerala India Vikram Sarabhai Space Ctr Expt Mech Div Thiruvananthapuram 695022 Kerala India Rajadhani Inst Engn & Technol Dept Mech Engn Thiruvananthapuram 695102 Kerala India Indian Inst Space Sci & Technol Dept Phys Thiruvananthapuram 695547 Kerala India

Sandwich structures, in the modern aerospace industry, are more sought after due to their high strength to stiffness ratio resulting in significant weight gains. Optical techniques like time-average holography and shearography are preferred in industries for inspection of huge sandwich and composite panels because of whole-field (full coverage) inspection in a lesser time leading to large savings in cost. These techniques conventionally use sinusoidal frequency sweep to capture the local resonance of defective regions. This paper highlights the difficulties with the conventional approach of time-average digital holography (TADH) and proposes a novel defect identification strategy through square wave excitation. The proposed method enhances the speed and accuracy of inspection;thereby it saves cost and increases confidence level. Extensive experiments have been carried out using honeycomb sandwich panels to demonstrate the methodology. (C) 2017 Optical Society of America

关键词： Digital holographic imaging Holographic interferometry image processing image processing algorithms Industrial inspection Off axis digital holography

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